ArticleJournal of bacteriology2012
Identification of a third osmoprotectant transport system, the osmU system, in Salmonella enterica.
Article in Journal of bacteriology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
27 citing papers in PubMed, 54 citations in OpenAlex.
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- Comparative genomics of Salmonella enterica serovar Montevideo reveals lineage-specific gene differences that may influence ecological niche association.Microbial genomics · 2018Article
- Quantitative RNA-seq Analysis Unveils Osmotic and Thermal Adaptation Mechanisms Relevant for Ectoine Production inFrontiers in microbiology · 2018Article
- Identification of some main Streptococcus iniae associated proteins: relationship.Veterinary research communications · 2017Article
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Corrections and comments
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
Abstract
The growth of Salmonella enterica serovar Typhimurium mutants lacking the ProP and ProU osmoprotectant transport systems is stimulated by glycine betaine in high-osmolarity media, suggesting that this organism has an additional osmoprotectant transport system. Bioinformatic analysis revealed that the genome of this organism contains a hitherto-unidentified operon, designated osmU, consisting of four genes whose products show high similarity to ABC-type transport systems for osmoprotectants in other bacteria. The osmU operon was inactivated by a site-directed deletion, which abolished the ability of glycine betaine to alleviate the inhibitory effect of high osmolarity and eliminated the accumulation of [(14)C]glycine betaine and [(14)C]choline-O-sulfate in high-osmolarity media in a strain lacking the ProP and ProU systems. Although the OsmU system can take up glycine betaine and choline-O-sulfate, these two osmoprotectants are recognized at low affinity by this transporter, suggesting that there might be more efficient substrates that are yet to be discovered. The transcription of osmU is induced 23-fold by osmotic stress (0.3 M NaCl). The osmU operon is present in the genomes of a number of Enterobacteriaceae, and orthologs of the OsmU system can be recognized in a wide variety of Bacteria and Archaea. The structure of the periplasmic binding protein component of this transporter, OsmX, was modeled on the crystallographic structure of the glycine betaine-binding protein ProX of Archaeoglobus fulgidus; the resultant model indicated that the amino acids that constitute substrate-binding site, including an "aromatic cage" made up of four tyrosines, are conserved between these two proteins.
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Registered trials
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